2 Months Left

I have two months left to submit my thesis and I’m panicking. I still have to edit my introduction, and three chapters, one of which is in an absolute state and needs extensive rewriting. No conclusion yet. I feel so sick and anxious every minute I’m awake worrying about not getting it done in time. I’m trying to be productive but I’m frozen in panic every time I try and write. Does anyone have any tips or advice? It feels impossible atm.